Communications Functions

The following functions are used with communications resources.

Function	Description
BuildCommDCB	Fills a specified DCB structure with values specified in a device-control string.
BuildCommDCBAndTimeouts	Translates a device-definition string into appropriate device-control block codes and places them into a device control block.
ClearCommBreak	Restores character transmission for a specified communications device and places the transmission line in a nonbreak state.
ClearCommError	Retrieves information about a communications error and reports the current status of a communications device.
CommConfigDialog	Displays a driver-supplied configuration dialog box.
EscapeCommFunction	Directs a specified communications device to perform an extended function.
GetCommConfig	Retrieves the current configuration of a communications device.
GetCommMask	Retrieves the value of the event mask for a specified communications device.
GetCommModemStatus	Retrieves modem control-register values.
GetCommProperties	Retrieves information about the communications properties for a specified communications device.
GetCommState	Retrieves the current control settings for a specified communications device.
GetCommTimeouts	Retrieves the time-out parameters for all read and write operations on a specified communications device.
GetDefaultCommConfig	Retrieves the default configuration for the specified communications device.
PurgeComm	Discards all characters from the output or input buffer of a specified communications resource.
SetCommBreak	Suspends character transmission for a specified communications device and places the transmission line in a break state.
SetCommConfig	Sets the current configuration of a communications device.
SetCommMask	Specifies a set of events to be monitored for a communications device.
SetCommState	Configures a communications device according to the specifications in a device-control block.
SetCommTimeouts	Sets the time-out parameters for all read and write operations on a specified communications device.
SetDefaultCommConfig	Sets the default configuration for a communications device.
SetupComm	Initializes the communications parameters for a specified communications device.
TransmitCommChar	Transmits a specified character ahead of any pending data in the output buffer of the specified communications device.
WaitCommEvent	Waits for an event to occur for a specified communications device.